Red cell phenotypes classified by their antigenic structural characteristics, which are under the control of various allelic genes.
Note: The cell membrane properties that provide the specific antigenicity of the blood groups are called agglutinogens, as they agglutinate or clump in the presence of their specific antibody.
Example: O, A, B
Source:
PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1124 (https://doi.org/10.1515/pac-2016-1120)